Snow App: äldre versioner att ladda ner

New Features
- More IDE Support: RustRover, Aqua, and DataSpell are now detected and offered in the "Open with" menu for project directories.
- API Provider Search: The provider list in API settings supports search filtering.
- Large Token Units: Token quantity display now supports T/Q/Qi units.
Improvements
- Checkpoint Enhancements: Checkpoint operations gain atomicity and localization; remote checkpoints are faster with batched remote IO and SSH session reuse.
- Performance: Optimized panel dragging and conversation switching (viewport virtualization).
- Multi-select action buttons now have tooltips and adapt to narrow widths.
Bug Fixes
- Fixed cross-session race conditions in checkpoint rollback.
- Fixed WSL working directory handling when hosted on Windows.